Tube-coupling.



S.. G. PORST.

TUBE GOUPLING. APPLGATIoN HLBD JUNE 17, 1912.

Patented Deo. 9, 11913.

lid

Altd' lldlltlihld,

imo all 'whom t may conceive,

Be it known that l, SAMUEL Gr. Forer, a citizen et the Unit/ed States,residing at rllorcnto, in the county' ot York and Province of tlntario,Dominion ot- Canada, have Ainvented a nenT and useful llinprovernent inrl`ube-Conplers, ot which the tollovving is a specication. y

My invention relatesv to means .by which flexible tubes may be quicklycoupled ton gether, to provide a clear and unobstructed passavo Way torthe conveyance of air, water and steam.

hiy coupling is specially adaptedto be used in connection vvithpneumatic tools.

whereby an absolutely air-tight connection is required at the connectionot the tool with the end of the flexible tube, and also at any point inthe tube Where two ends i together.

.ll/iv coupler also involves means in its construction by which it issecurely attached to the end of the tube.

l attain these objects by the device as illustrated in the accompanyingdrawings, in vvhich- Figure l isa perspective view of the coupler. Fig.2 is a longitudinal sectional view through the coupler. Fig: 3 is adetailed perspective vievv ol" the coupler uncoupled. Fig. l is across=sectional vievv through the coupler on lines M Fig. 2. `Fig. 5 isa perspective vievv ciE a part ot coupler, and, Fig.I 6 is a perspectivevievv, partially in section ot the 'means tor connecting vlitli thedcsible tube.

Similar letters roter to similar parts throughout the several views..

aand Z9 designate respectively the head and shank sections of thecoupler, lwhich,

consist essentially of semi-cylindrical members adapted to engagetogether over the free' ends of the tube c. Formed on the internal wallsof the sections o and o are pointed projections al, adapted to impressinto the tube c to prevent it turning or from being tit Withdrawn fromthe coupling, either when handled or from the linternal pressure fluidconveyed by the tube.

While l have shown pointed projections extending from the inner walls ofthe sections a and b, any other torrn by which the inner walls may beroughened to bite into the flexible surface of the tube may be provided.Formed in the convex surface of the vmembers a and. o are channels e.The chantlnecitlcation ot Letters ltatent,

Application tiled .lune it,

are coupledg Patented lloc nl, illllltt, ser-iai in. roe-,aaa

nels e are so situated that tvhen the senncylindrical sections arebrought together, they become continous, so that a circuniter entialchannel is toi-ined.

-f designatesclampingrings engaging in the circumferential channelsbyvvhich the semi-cylindrical sections are held together in acylindrical form to firmly attach around the tube c., .'lhe clampingrings may be oit any suitable i'crrn preferable, as shown in thedrawings in which they' consist oit a nietal band g formed with a headit. on each end. Through the heads are screvv threaded bores, in whichengage set screws'e' by which the ends may be drawn together to rmlyclamp the sections. Formed along the adjoining edges ot the sections aand "t are alternate projections and indentures adapted tocorrespondingly interlock. to prevent the sections trom longitudinaldisplace nient. 4

While l have shown the projections and indentures along the adjoiningedges ot the sections, any other torni ot interlocking edgesmay beintroduced, either alongl the sides or in trom the ends tor 'the sapurpose without' deviating from the nature ol' my invention.. 4

c represents the head end ot the coupler and o the socket end. Formed onthe outer tace ot the head are helical danges Z, and formed on the innertace ot the soclret are locking lugs m. 'lo couple the parts o and theends are brought together so that the locking lugs m are broughtopposite the grooves n termed between thehelicelanges on the hea-d, whenthe head is then forced int-o the socket, and the parts partially rotated in opposite directions, so that the locking lugs m lock behindythe helical langes Z. rthe front end of each oi' the helical flangesdit litt

on the head a are formed with a small shoulder against which the lockinglu s abut, to prevent them from turning Abac ward,.eXcept by a stronreverse rotatable action, which may be e ected by taking a part in eachhand, and pressing inwardly and turning in opposite directions, in whichmanner the ends may be uncoupled. o ,designatos a thirnble engaging in achannel p formed in the internal Walls of the section b, the bore of thethimble being of the same diameter as the bore of the parts a and b whenclamped together.

To couple together a flexible tube, the section a is clamped around thetube leaving a `clam in lie parts a and b together. On the end. section1, I have shown a screw` part of the tube projecting slightly beyond thehead end. The section b is then clamped around the end of the tube c,the end of the tube extending only as far as mid-way through the thimbleo, so that when the two ends of the ,coupling are interlocked, the endsof the tube will be firmly engaging together. The object of bringing theends of the tube together in the center part of the thimble, is tocreate anair-tight junction by the internal pressure of the tluidforcing the ends of the tubes tightly against the inner walls of thethimble. The greater the internal pressure, the tighter the ends of thetubes will be forced against the thimble thereby as far as possibleeliminating all cause of leak.

' While I have shown the means for coupling the shank and head togetherconsisting of helical flanges formed on the head a of the section a, andlocking lugs m formed in the inner walls of the socket b of the sectionb, formed in wedged shape, so that the greater the rotation of the partsin opposite directions tighter they are held together. I may slightlyvary the desi of the respective locking lugs and helica iianges withoutdeviating from the nature of that part of my invention. One of theessential features of my invention lies in the means of quickly andtightly connecting the two ends together, and to eliminate washers,packing rings, and screw threads.

While Ihave shown my coupling adaptable to couple two ends oftlexibletube together, the same principle of coupling may be introducedin connecting the end of the tube with the various forms of pneumaticvtools. In Fig. 6 I have shown a slight modification in the form of aconnectlon for` the end of the tube with the tool, 4in which 1designates the connection having a part 2 removable for the purpose ofinsert.

ing the end of the tube into the section. The section 2 has formed -onits inner walls pointed-projections 3 adapted to impressy into the tube,and it is held in position by g rings 4, similar to those for clamping tof the threaded head 5 adapt-ed to screw into the tool, but for allpractical purposes I will in coupling, the

engage with said flanges, as and for f form at the end ofthe section,helical lianges similar to those shown in the section a, to engage withlocking lugs formed with the connection shown in the socket end of thesection b, so that the end of the tube may be Vquickly connected withthe tool.

While I have described my coupling especially adapted to a flexible tubeto be used in connection with pneumatic tools, the same principle ofcoupling may be used Afor ordinary steam and water tubes.

jWhile the parts are described and adapted for the purpose of acoupling, the section b may' be readily utilized as a tube jacket forleak stopping, by slipping over the bursted part of the flexible tubesthe thi'mble, and clamping the sections b together by the clamping ringsf. ,Als a further means for clamping the sections a and o together, Imay form on the fastening lugs 7', .as shown in dotted lines,

.in Figs. 1, 4, and 5, to hold together the members by bolts or setscrews.

What I claim as new and 'desire to secure by Letters Patent is A tubecoupler, consisting of semi-cylindrical members, interlockingprojections and indentures formed along the edges of saidsemi-cylindrical members, said semicylindrical members adapted to engagein cylindrical form, channels formed 1n the convex faces of saidmembers, clamping rings adapted to en age in said channels, means fordrawing t e ends of said clamping rings together to maintain saidmembers in cylindrical form, the inner walls of said members ybeingroughened or having points projecting therefrom, socket and head ends`formed on the ysaid members, anges formed in helical relation on thesald head ends, and lockinglu'gs formed in h'elical relation on the saidsocket4 end, said head end adapted to engage in the said socket end, andsaid locking ugs adapted to t e purpose specliied. Signed at Toronto the13th day of June Jos Pomionsnn, A. A. ADAMS.

from the tool, similar to those side edges of each section,

